Window-cleaning platform.



H. BOTTJER.

WINDOW CLEANING PLATFORM.

APPLICATION FILED JULY 3, 1913 1,0 ,525, Patented Feb. 24, 19m

2 SHEETS-SHEET 1.

WITNESSES INVENTOR fig), hE/V/PY 5071/5? &

' I By M w MNE S COLL'IIIA PLANOGIAHI C0.,WAIH1NGTON. D. C.

H. BOTTJER.

WINDOW GLEANING PLATFORM.

APPLIQATION FILED JULY 3, 1913.

1 ,O88,525, Patented Feb. 24, 1914,

2 SHEETS-BHEET 2.

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WITNESSES I Q lNl/E/VTUR 113E STAT HENRY BOTTJER, OF NEW YORK, N. Y.

WINDOVI-CLEANING PLATFORM.

Application filed July 3,

To all whom it may concern Be it. known that I, HENRY BO'ITJ'ER, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and 1111- proved lVindow-Cleaning Platform, of which the following is a full, clear, and exact description.

This invention relates to temporary platwhich render this device safe in use and,

easily transportable from one window to another or for storing away.

The foregoing and other objects of the inventlon will hereinafter be more fully de scribed and claimed and illustrated in the drawings forming a part of this specificat1on in which like characters of reference 111- dicate corresponding parts in all the views,

and in which Figure 1 is a perspective view of a device made in accordance with this invention as it would be seen from the inside of a building and looking down at an angle upon the seat portion of the platform, the window being indicated in dotted lines; Fig. 2 is an end View of the device folded; Fig. 3 is a plan view of the same; Fig. 4 is a vertical section on the line 4-4 of Fig. 3; and Fig. is a similar section on the line 55 of Fig. 1.

Except as hereinafter stated, the device may be made of any suitable materials, and the relative sizes and proportions of the same may be varied to a considerable extent without departing from the spirit of the invention hereinafter more fully set forth and specifically claimed.

The seat portion 10 of the device comprises a series of parallel bars 11, 12 and 13, each of which is shown as comprising a pair of telescoping members so as to accommodate the length of the seat to the width of Specification of Letters Patent.

! trio Patented Feb, 241, 1914.

1913. Serial No. 777,219.

" window. The bars 11 and 13 may preferably be of heavier and more substantial material than the intermediate bars 12. All of the bars at one end are connected by an end bar 1 1 and at the other end by a similar bar 15. Each of the bars is connected permanently and rigidly at the ends of the respective sections of the bars 12 and adjacent the ends of the bars 11 and 13. Adjacent the front bar 13 the first bar 12 is bentat its ends 12 and secured to the next bar 12, making provision for slides 16 on the inner ends of the end bars 1st and 15, said slides being provided with toothed shanks 17 adapted (O engage over the upper surface of the win dowsill S. Each shank on its end is provided with a finger 18 having a knuckle joint 19 to limit its movement substantially to a right angle. The finger, however, is adapted to fold up against the bottom of the shank as shown in Fig. 2, where it will be held by means of the dog 20 pivoted at 21 and under the force of a leaf spring 22. When in ad justed or operative position the dogs 20 cooperate with the teeth 23 of the shanks so as to limit the relative longitudinal movement of the slides and shanks along the end rods 1 1 and 15. In other words, the shanks and the fingers 1S hinged thereto will be adjusted in accordance with the width of the windowsill and there locked by means of the spring pressed dogs 20. The ends of the rod 13 have plungers or bolts 2% adapted to be projected beyond the said ends so as to interlock with the inner wall of the building at the window casings. Each of the bolts 2a is projected and controlled in its position by means of a thumb piece 25 operating along in a bayonet slot- 26. lVhen the bolts 24 are projected the entire construction is prevented from being precipitated from the window. A back rail 27 likewise telescopic in its nature is journaled in the hubs 28 of arms 29 connected to or journaled upon the outer rail 11. Said back rail 27, when thrown up wardly and rearwardly as shown in Fig. 1, so as to stand substantially perpendicularly to the seat 10, will be maintained in position by a pair of jointed braces 30. Each of said braces is hinged at 31 adjacent one end of the bar 27 and at its other end at 32 to a link 33 pivoted at 3 1 in one of the cross bars 35. These cross bars lie parallel and closely adjacent the aforesaid end bars 1 1 and 15 and are connected at their ends to the ends of the bars 11 and 13. The braces are so arranged that their joints 34: break inwardly toward each other when the device is folded.

A pair of standards 37 are pivoted at 38 to the cross bars substantially at their middle points and extend above and below the same, as shown best in Fig. 1. Each of these standards is composed of two parallel members connected at their upper ends by means of a loop or clevis 39 which permits said standard to fold down closely upon its cross bar 35, as shown in Fig. 2. Braces 4L0 are pivoted intermediate their ends to the lower ends of the standards 37, each brace lying between the lower ends of the standards and connected thereto by means of a pivot pin 41 and having at its outer end a ball 42 slidable along a slot as and within the cross bar 35. The lower end of each brace is adapted to rest against the outer wall of the building. The standards are maintained in stable position when the device is in operation by means of pawls 44E pivoted at 4:5 to the cross bars 35 between the pivots 34c and 38. Each of the pawls is adapted to interlock with teeth 37 formed on the front face of each standard 37, and since the standard is composed of two members, each pawl likewise has a pair of engaging fingers 44. It is to be noted also that the braces 30 extend between the several pairs of members constituting the braces 37 whereby when the standards are upright and are so held by the pawls M, the braces 30 cannot break at their joints 36, and hence the back rail 37 is maintained in its upright position.

To remove the device from a window the operator swings the pawls 44: toward the window on their pivots 45, and then the standards 37 may be likewise swung until the tops of the clevises 39 engage the cross bars 35. During this movement of the standards the ball ends of the braces 40 move outwardly toward the arms 29 of the back. The braces 30 may then be broken, allowing the back to swing forwardly, and the braces will then occupy the position shown in Fig. 3. The platform may then be lifted in through the window and passed through another window to be cleaned. The shanks and fingers 13, and also the bolts 24, may remain in a definite position throughout the cleaning of any number of windows of the same character. If, however, the device is to be folded away for future use, the folding may be effected by retracting the bolts 2% and bending the fingers up, as shown in Fig. 2.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a window cleaning platform, the combination of a seat portion including a pair of cross bars at its ends, a back hinged to the rear edge of the platform and movable through an angle of 90 degrees, hinged braces limiting the said movement, said braces being hinged at their ends to the back and to said cross bars, and means to support the platform in substantially horizontal position on the outside of a window, said supporting means including a pair of standards normally preventing movement of the braces on their hinges and acting therefore to prevent movement of the back aforesaid, substantially as set forth.

2. In a window cleaning platform, the combination of a seat portion, a back rail, a pair of hinged braces connected to said rail and limiting its outward movement, said braces being pivotally connected at both of their ends to the back rail and to said seat portion and having their middle portions breakable toward each other in folding, and devices connected to the seat portion serving to support the same against the outer wall, said supporting devices in normal position preventing the breaking of said back rail jointed braces.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY BOTTJEP.

Witnesses GEO. N. WILLIAMS, CHRISTOPHER Bose.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

